Home / 20,939.32-28,895.05-11,507.88

Finding the Fourth Proportional to 20,939.32, 28,895.05 and 11,507.88

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Solution

The fourth proportional to 20,939.32, 28,895.05 and 11,507.88 is: 15,880.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.32 : 28,895.05 = 11,507.88 : x
  2. Step 2: Convert to fraction form
    20,939.32/28,895.05 = 11,507.88/x
  3. Step 3: Cross multiply
    20,939.32x = 28,895.05 × 11,507.88
  4. Step 4: Simplify right side
    20,939.32x = 332,520,767.99
  5. Step 5: Solve for x
    x = 332,520,767.99/20,939.32
  6. Step 6: Final answer
    x = 15,880.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.